Weather Resistant: 15A 125V GFCI receptacle, withstand 20KV, 10KA voltage surge, weather resistant (WR), using advanced UV stabilization engineering, effectively prevent discoloration and aging; prolonged service life Thinner Design: The thickness of this GFCI has been optimized to be 20% thinner than competitors, compatible with new and used electrical boxes, allows more space for wiring inside the electrical box, better heat dissipation Tamper Resistant: The sockets are equipped with tamper-resistant shutters to prevent foreign objects and dust from entering effectively. With a ground fault circuit interrupter that shuts off power in milliseconds 2 Wiring Styles: Back and side wiring, the terminal hole is 4mm in diameter, allowing access to 12 AWG wires; with two-color indicator LED light, provides a reminder when wired and used Amico Benefits: 3-Year Product Support! All Amico's GFCI are certified by ETL of a high standard. Our customer support team will also address your concerns within 12 hours